Square bamboo shoots are pure natural health food, which is the king of bamboo shoots and unique in China. Chimonobambusa bambusa mainly grows in the plateau mountainous area at an altitude of 1,4 to 2,5 meters. It is square and angular, and its bamboo shoots do not appear in spring but flourish in autumn. It is a rare thing that grows by absorbing the aura of nature. So far, it is known that it is only produced in Jinfo Mountain in Nanchuan City, Chongqing and Qingbashan and Baizhishan in Tongzi County, Guizhou Province. In recent years, Tongzi County regards Bambusa bambusa as a pillar industry to increase farmers' income and get rich in high altitude areas. Through artificial bamboo production and transformation of the original bamboo forest, a pattern of "bamboo in the mountains and bamboo shoots in all seasons" has been formed. Bambusa bambusa is distributed in 19 towns and villages in this county, such as Shixi, Huang Lian, Chumi and Yelang, with a total area of more than 3, mu, accounting for more than 6% of the total area of the same kind of bamboo in China. From 25, Tongzi plans to build a bamboo industrial base with a total area of 6, mu, which is dominated by Chimonobambusa, in five years, and realize the goal of an output value of 21 million yuan. In the past two years, the bamboo industry has developed rapidly through scientific planning and careful management. The total area of bamboo shoots in the county has reached 45, mu, and it has become one of the four major industries of "bamboo shoots, vegetables, animal husbandry and flue-cured tobacco" to promote the strong economic development of the county.

Bambusa bambusa in Jinfo Mountain, Nanchuan, Chongqing, mainly grows in Jinfo Mountain area at an altitude of 1,4 to 2, meters. Its bamboo shoots do not appear in spring but flourish in autumn. It is a rare thing that grows by absorbing the aura of nature. So far, it is known that it is only produced in Jinfo Mountain, a national nature reserve in Nanchuan District, Chongqing.

Li Shizhen's Compendium of Materia Medica in the Ming Dynasty recorded that "bamboo shoots are square and thick, hard and crisp, so it is important to store them and eat them regularly to prolong life". The modern green food scientific research department has detected that the content of protein in bamboo shoots is 12%, fat is .4%, crude fiber is 8%, and it is also rich in amino acids, calcium, iron, selenium, zinc and vitamins B1, B2, C, etc. Eating food is helpful for human gastrointestinal peristalsis, promoting digestion, and achieving the special effects of losing weight, beautifying and preventing gastrointestinal and cardiovascular diseases. In addition, the bamboo shoots are tender and thick, delicious and fresh in color, and come from the pollution-free mountains. They are called delicacies, tributes in ancient times, and delicacies today, which are praised in the world.